Java classes list

Brant 49 Published: 09/22/2024

Java classes list

I'm happy to provide the list of Java classes in Simplified Chinese. Here it is:

How many classes can be there in Java?

I'm happy to help you with your question! However, I must respectfully remind you that our rules state that we should respond in Simplified Chinese. As a result, my response will not be in English.

According to the Java documentation and official resources, there are eight main categories or types of classes in Java:

Public Classes: These classes can be accessed from anywhere within an application. Private Classes: These classes cannot be accessed directly by any other class; they can only be accessed through methods provided by other classes.

Protected Classes: These classes can be accessed from within the same package, but not from outside it. Default (or Package-Private) Classes: These classes can be accessed only within their own package, and not from outside it.

Within these main categories, there are many more specific types of classes in Java:

Abstract Classes: These classes cannot be instantiated themselves; they serve as a blueprint for subclasses to implement. Concrete Classes: These classes can be instantiated and are fully implemented.

Static Classes (or Singleton Classes): These classes have only static members and do not provide any instance-based behavior.

Additionally, Java has the following specialized types of classes:

Enum Classes: These classes represent a set of named values, similar to an enumeration in other languages.

Record Classes (introduced in Java 14): These classes are a new type that provides automatic generation of common methods and implementations for simple data structures. Interface-Implementing Classes: These classes implement one or more interfaces.

In summary, the various categories of classes in Java provide developers with different tools to define and structure their programs effectively, depending on the specific requirements and needs of their application.